Improved QoE-based scheduling algorithm in WiMAX network

摘要

Motivated by the increasing demand for multimedia services in the internet broadband networks, WiMAX (Worldwide Interoperability for Microwave Access) technology has emerged as a competitive alternative to wired networks broadband. WiMAX is used today as a method of transmission and high-speed internet access, covering a wide geographical area. Unlike DSL (Digital Subscriber Line) or other wired technology. In parallel, it was observed that in the difference of the traditional quality evaluation approaches, nowadays, current researches focus on the user perceived quality, the existing scheduling approaches take into account the quality of service (QoS), mobility and many other parameters, but do not consider the Quality of Experience (QoE). In this paper, we develop a scheduling algorithm to provide QoE in WiMAX network and improve its performances by controlling the packet transmission rate so as to match with the minimum subjective rate requirements of each user. A novel approach is proposed, especially for the Best Effort (BE) WiMAX service class. Simulation results on NS-2 simulator show that by applying various levels of MOS (Mean Opinion Score) the QoE provided to the users is enhanced in term of jitter, packet loss rate, throughput and delay.